Sound insulation for outboard motors
AssigneePolymer Technologies Limited
InventorCarl L. Wolaver
Life of this patent
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Abstract
Sound insulation for an engine contained within an outer casing, the insulation made up from a minimal number of interlocking molded foam insulation pieces forming a substantially continuous shroud surrounding the operating parts of the engine and having an outer surface matching the inner shape of the outer casing and in contact therewith. Preferably the outer casing is used to generate the molds used to manufacture the molded sound insulation pieces, thereby providing a good surface fit between the outer insulation surface and the inner casing surface.
Claims17
A sound insulation of an outboard motor comprising:
- (a) an engine, an exhaust manifold and a drive mechanism for driving a propeller, and
- (b) an outer cover encasing said internal combustion engine, cooling and exhaust manifold and at least a portion of said drive mechanism,
- wherein the sound insulation comprises a substantially continuous shroud formed by at least two separable sections of a molded flexible resilient material placed in said outer cover, said shroud having an outer surface shaped substantially complementary to an inner surface of said cover and wherein said outer shroud surface is in contact with said inner surface of said cover.
A method for sound insulating a marine motor comprising an engine section, and an exhaust manifold, the method comprising encasing said motor with a molded foam shroud comprising at least two interlocking demountable insulating material sections molded to fit an inside surface of an existing casing for such motor wherein said at least two interlocking pieces form a substantially continuous sound barrier, said shroud being in contact with said with said inside surface of said casing.
Dependencies are inferred from the claim text.